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Finding the Fourth Proportional to 121,261.70, 181,892.55 and 91,737.20

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Solution

The fourth proportional to 121,261.70, 181,892.55 and 91,737.20 is: 137,605.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,261.70 : 181,892.55 = 91,737.20 : x
  2. Step 2: Convert to fraction form
    121,261.70/181,892.55 = 91,737.20/x
  3. Step 3: Cross multiply
    121,261.70x = 181,892.55 × 91,737.20
  4. Step 4: Simplify right side
    121,261.70x = 16,686,313,237.86
  5. Step 5: Solve for x
    x = 16,686,313,237.86/121,261.70
  6. Step 6: Final answer
    x = 137,605.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.